Registers – Coded record sensors – Particular sensor structure
Patent
1977-08-05
1979-03-27
Kilgore, Robert M.
Registers
Coded record sensors
Particular sensor structure
235463, 235466, G06K 710, G06K 714
Patent
active
041467825
ABSTRACT:
A manually supported reader for a bar code which comprises a plurality of parallel bars of varying widths employs an optical detector which generates an electrical output signal which is a function of the code as the detector is moved. The detector comprises a light source and a light sensor, optically arranged to reflect light off of that part of the bar code with which it is in contact, thereby varying the output signal of the detector each time a boundary of one of the bars within the code is traversed. A decoding network receives the output signal from the detector and determines the time required to traverse each successive bar. A signal associated with the traversal of each bar is compared with an internally generated criterian. As a result of the comparison, the bar associated therewith is classified as to its width. Based on that classification, the criterian is recalculated for comparison with the signal associated with the next bar scanned. The decoding circuitry can be implemented within computer software or hard wired.
REFERENCES:
patent: 3701097 (1972-10-01), Wolff
patent: 3744026 (1973-07-01), Wolff
patent: 3761685 (1973-09-01), Alpert
patent: 3783245 (1974-01-01), Howell
patent: 3854036 (1974-12-01), Gupta
patent: 3991299 (1976-11-01), Chadima
Kilgore Robert M.
Process Computer Systems, Inc.
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